Verilink PRISM 3021 (34-00262) Product Manual - Manual (Page 28)

4-6 Terminal Operation PRISM 3021
FEBE E VENTS
This is the actual number of far-end block errors (FEBEs)
that the unit has received. This count accumulates until it
reaches 65535 or is reset by pressing ENTER with the Reset
field highlighted.
R ESET P ERFORMANCE R EGISTERS
This field allows the element registers to be reset and may
only be used when the Target field is set to User. If ENTER
is pressed, the following warning appears:
DELETE ALL PERFORMANCE DATA?
(NO!) (YES)
The remaining common fields in the performance screens
are for display only. They are defined as follows:
S TATUS
This field displays the selected E1 line status derived from
the type or absence of errors in the received data. This status
represents the immediate state of the received E1 signal and
is not related to the alarm thresholds. This field shows one
or more of the signal status conditions listed in Table 4-D
on page 4 -10.
C OMPLETED D AYS
This field displays the number of days included in the 30-
day totals.
C OMPLETED I NTERVALS
This field displays the number of 15-minute intervals in the
last 24-hour period since the registers were last cleared.
24 H R .% E RROR F REE
This field displays the number of 15-minute intervals in the
last 24-hour period since the registers were last cleared. It is
based only on the ES and UAS parameters.
30 D AY % E RROR F REE
This field displays the number of one-day intervals in the
last 30-day period since the registers were last cleared. It is
based only on the ES and UAS parameters.
P ERFORMANCE D ATA
The main body of display data consists of error events for
three different periods: the first display line shows the data
accumulated for the current interval (from 0 to 900 sec-
onds), the second line shows the totals for the last 24-hour
period (or the last 96 fifteen-minute intervals), and the third
line shows the 30-day totals.
The remaining lines of this screen show the data for any
intervals containing errors. They are explained in the follow-
ing paragraphs.
If more than four errored intervals have elapsed, [PAGE-
DN] appears to the left of the performance data. Pressing
ENTER on this field displays the next four errored intervals.
[PAGE-UP] appears once [PAGE-DN] is used. Pressing
ENTER on [PAGE-UP] displays the previous four errored
intervals. Only intervals that contained errors are displayed,
which eliminates rows of zeros. If an interval is not dis-
played, no errors were detected during that period.
Parameters shown on the performance screens
are updated at five-second intervals.
E1 24 H OUR AND E1 30 D AY E RROR P ARAMETERS
Time and Date: The E1 24 Hour screen shows the time in
15-minute increments. The E1 30 Day screen shows the date
in one-day increments. The real time (or date on the 30-day
screen) of the interval beginning is shown.
Interval: In the 24 Hour screen, Interval 1 is the most
recently stored 15-minute interval and interval 96 is the old-
est in the current 24-hour period. On the 30 Day screen,
interval 30 is the oldest one-day interval in the current 30-
day period.
FEBES (Far-End Block Error Seconds): This is the num-
ber of seconds that the unit has received a far-end block
error status.
FMFE (Far-End Multiframe Errors): This is the number
of seconds that the unit has recorded far-end multiframe
errors.
MFRAS (Multiframe Remote Alarm Seconds): This is
the number of seconds that the unit has received a multi-
frame remote alarm status.
Degraded: This is the number of degraded seconds that the
unit has recorded.
S TANDARD 24 H OUR AND S TANDARD 30 D AY E RROR
P ARAMETERS
Time and Date: The Standard 24 Hour screen shows the
time in 15-minute increments. The Standard 30 Day screen
shows the date in one-day increments. The real time (or date
on the 30-day screen) of the interval beginning is shown.
Interval: In the Standard 24 Hour screen, Interval 1 is the
most recently stored 15-minute interval and interval 96 is
the oldest in the current 24-hour period. On the Standard 30
Day screen, interval 30 is the oldest one-day interval in the
current 30-day period.
ES (Errored Seconds): This is the number of one-second
periods in which at least one error occurred.
UAS (Unavailable Seconds): This is the number of one-
second periods in which consecutive severely errored sec-
onds cause an unavailable state.
BES (Bursty Errored Seconds): This is the number of one-
second periods with more than one, but less than 320 CRC4
error events.